Stroller frame



FIG. 1 is a top view of the stroller frame according to my design;

FIG. 2 is a right side view thereof;

FIG. 3 is a perspective view, taken from the rear, right side thereof;

FIG. 4 is rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a perspective view, taken from the front, right side thereof; and,

FIG. 8 is a bottom view thereof. 

The ornamental design for an stroller frame, as shown and described. 